1 #ifndef _CTYPE_H 2 #define _CTYPE_H 3 4 /** @file 5 * 6 * Character types 7 */ 8 9 FILE_LICENCE ( GPL2_OR_LATER ); 10 11 #define isdigit(c) ((c) >= '0' && (c) <= '9') 12 #define islower(c) ((c) >= 'a' && (c) <= 'z') 13 #define isupper(c) ((c) >= 'A' && (c) <= 'Z') 14 15 static inline unsigned char tolower(unsigned char c) 16 { 17 if (isupper(c)) 18 c -= 'A'-'a'; 19 return c; 20 } 21 22 static inline unsigned char toupper(unsigned char c) 23 { 24 if (islower(c)) 25 c -= 'a'-'A'; 26 return c; 27 } 28 29 extern int isspace ( int c ); 30 31 #endif /* _CTYPE_H */ 32
